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GMC - General motors
Official notice
24 Feb 2026
Last checked
24 Feb 2026
An official Health Canada notice concerns GMC - General motors. Issue: on certain vehicles, the recall repairs completed by a general motors dealer during recall n242454440 (transport canada recall no. 2024-637) may not have been done correctly. As a result, a second repair is required. Over time, the transmission control valve could wear and lose pressure. If this happens, the transmission could shift harshly and could cause the rear wheels to lock up. Note: this recall only affects vehicles equipped with a diesel engine. Safety risk: rear wheels that lock suddenly could cause a loss of control and increase the risk of a crash. Corrective actions: general motors will notify owners by mail and advise you to take your vehicle to a dealership to update the transmission control module software to detect excess wear in advance of a wheel lock up. If detected, a service engine light would turn on, a message would display in the instrument panel and the vehicle would be limited to fifth gear. Published 2026-02-24.
What to do now
Please see corrective actions section below
Recall number
81660
Official notice
2026-02-24
The hazard
The hazard
Issue: on certain vehicles, the recall repairs completed by a general motors dealer during recall n242454440 (transport canada recall no. 2024-637) may not have been done correctly. As a result, a second repair is required. Over time, the transmission control valve could wear and lose pressure. If this happens, the transmission could shift harshly and could cause the rear wheels to lock up. Note: this recall only affects vehicles equipped with a diesel engine. Safety risk: rear wheels that lock suddenly could cause a loss of control and increase the risk of a crash. Corrective actions: general motors will notify owners by mail and advise you to take your vehicle to a dealership to update the transmission control module software to detect excess wear in advance of a wheel lock up. If detected, a service engine light would turn on, a message would display in the instrument panel and the vehicle would be limited to fifth gear.
How to check if you're affected
How to check if you're affected
Compare the VIN on your vehicle against the official list. If your VIN is listed, follow the official notice.
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Where it was sold
Where it was sold
The source does not list specific retailers. See the official notice for where affected products were sold.
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Company & contacts
Company & contacts
Brand: GMC, Chevrolet.
Source & status
Source & status
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Documents, notices & source
See the official notice and source documents for full details.
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